What Is a Television Transmitter?
A television transmitter is a device that converts television images and audio information into radio waves for transmission.
There are two primary types: analog and digital television transmitters. Analog transmitters modulate video and audio information onto radio waves using frequency or amplitude modulation. Digital transmitters, in contrast, digitize and compress video and audio information, typically using MPEG-2, for transmission.
Television transmitters comprise video/audio processing units, modulators, transmitting antennas, and high-frequency amplifiers. The processing units prepare the information, the modulator converts it onto radio waves, the transmitting antenna broadcasts these waves, and the amplifier enhances the signal strength.